NEW YORK
Shares of some top oil companies are mixed at noon:
Chevron fell $.01 or percent, to $78.33.
ConocoPhillips fell $.16 or .3 percent, to $53.42.
Exxon Mobil rose $.10 or .1 percent, to $72.71.
Marathon Oil fell $.23 or .7 percent, to $34.71.
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